My old Schwinn Le Tour is my commuter and my new Schwinn Le Tour is my weekend ride (and the MTB just hangs there most of the time waiting for me to take it out in the dirt). Nothing decadent about it.
I'm currently saving for a "good" road bike (105 or Ultegra vs. Sora/Tiagra mix on my new Schwinn) which will move my newer Schwinn to commuter duty and old Schwinn to grocery getter. 3 road bikes each with their own purpose. (I can come up with more uses for road bikes so decadent won't hit till I get past n+1).